Finding the Third Proportional to 721,591.50 and 1,558,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   721,591.50 : 1,558,810.50 = 1,558,810.50 : x
2. Step 2: Convert to fraction form
   721,591.50/1,558,810.50 = 1,558,810.50/x
3. Step 3: Cross multiply
   721,591.50x = 1,558,810.50 × 1,558,810.50
4. Step 4: Simplify right side
   721,591.50x = 2,429,890,174,910.25
5. Step 5: Solve for x
   x = 2,429,890,174,910.25/721,591.50
6. Step 6: Final answer
   x = 3,367,404.10